That can't possibly be true. It would open up the country to even a minor incursion at any other part of the country. Sounds more like the same bs claims than the insistence of British forces and agencies of the existence of weapons of mass destruction in Iraq. Zero credibility.
Keeping in mind that Russia was the country that could not stop a minor incursion of a 25K large mercenary force driving to Moscow -- shooting Russian air assets down as they went.
The incursion only stopped after the FSB threatened and imprisoned the families of the mercenary leaders and then reached some type of financial agreement with Prigo to stop the incursion. Coupled with the hoped-for Russian leaders not coming over to Prigo's side.